- in a just manner; honestly; fairly: Deal justly with the prisoners.
- in conformity to fact or rule; accurately.
- deservedly; as deserved.
early 14c., “in an adjacent position, closely,” from just (adj.) + -ly (2). Meanings “truthfully, honestly,” “in an equitable manner, with justice, fairly” are from late 14c. Sense of “justifiably, with good reason” is from c.1400; that of “legally, legitimately, rightfully” is early 15c.